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arXiv 2212.07488hep-ph
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三分量标量暗物质的$Z_7$模型

The $Z_7$ model of three-component scalar dark matter

Geneviève Bélanger, Alexander Pukhov, Carlos E. Yaguna, Óscar Zapata

AI总结:

本文首次研究了由单一$Z_7$对称性稳定的三复标量场暗物质模型,通过求解包含半湮灭和转化过程的玻尔兹曼方程并进行参数空间随机扫描,发现该模型在广泛质量范围内可行,且三种暗物质粒子在未来直接探测实验中均可能产生可观测信号。

摘要:

我们首次研究了一种暗物质由三个复标量场组成的情景,这些场由单一的$Z_7$对称性稳定。作为著名的标量Higgs-portal的扩展,该$Z_7$模型同样受到来自遗迹密度约束和直接探测实验的重要限制。本文的目标是寻找并表征该模型的可行区域,并分析其在未来实验中的探测前景。首先,识别影响遗迹密度的过程(包括半湮灭和转化),随后将其纳入暗物质丰度的玻尔兹曼方程中,并使用micrOMEGAs进行数值求解。通过对参数空间的随机扫描,筛选出与当前数据一致的区域,包括来自LZ实验的最新直接探测限制。我们的结果表明,$Z_7$模型在很宽的暗物质质量范围内确实是可行的,并且转化和半湮灭在决定遗迹密度方面都发挥着重要作用。值得注意的是,我们发现,在许多情况下,所有三种暗物质粒子都能在未来直接探测实验中产生可观测信号,为测试该情景提供了合适的方法。

英文摘要:

We investigate, for the first time, a scenario where the dark matter consists of three complex scalar fields that are stabilized by a single $Z_7$ symmetry. As an extension of the well-known scalar Higgs-portal, this $Z_7$ model is also subject to important restrictions arising from the relic density constraint and from direct detection experiments. Our goal in this paper is to find and characterize the viable regions of this model, and to analyze its detection prospects in future experiments. First, the processes that affect the relic densities are identified (they include semiannihilations and conversions) and then incorporated into the Boltzmann equations for the dark matter abundances, which are numerically solved with micrOMEGAs. By means of random scans of the parameter space, the regions consistent with current data, including the recent direct detection limit from the LZ experiment, are selected. Our results reveal that the $Z_7$ model is indeed viable over a wide range of dark matter masses and that both conversions and semiannihilations play an important role in determining the relic densities. Remarkably, we find that in many cases all three of the dark matter particles give rise to observable signals in future direct detection experiments, providing a suitable way to test this scenario.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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